tree 75e8464d300c232efa1793477c555e1a5b7e0a80
parent 6c41f428b72afe5a581b967590c12538db31d399
author Avi Kivity <avi@qumranet.com> 1219422278 +0300
committer Avi Kivity <avi@qumranet.com> 1224058523 +0200

KVM: MMU: Add generic shadow walker

We currently walk the shadow page tables in two places: direct map (for
real mode and two dimensional paging) and paging mode shadow.  Since we
anticipate requiring a third walk (for invlpg), it makes sense to have
a generic facility for shadow walk.

This patch adds such a shadow walker, walks the page tables and calls a
method for every spte encountered.  The method can examine the spte,
modify it, or even instantiate it.  The walk can be aborted by returning
nonzero from the method.

Signed-off-by: Avi Kivity <avi@qumranet.com>